发布于 2017-03-03 06:03:05 | 236 次阅读 | 评论: 0 | 来源: 网友投递
jemalloc 内存分配管理
jason认为phkmalloc（FreeBSD’s previous malloc implementation by Kamp (1998)）没有考虑多处理器的情况，因此在多线程并发下性能低下(事实如此)，而jemalloc适合多线程下内存分配管理。
jemalloc 4.5.0 发布了。
新特性:
Add --disable-thp and the opt.thp mallctl to provide opt-out mechanisms for transparent huge page integration. (@jasone)
Update zone allocator integration to work with macOS 10.12. (@glandium)
Restructure *CFLAGS configuration, so that CFLAGS behaves typically, and EXTRA_CFLAGS provides a way to specify e.g. -Werror during building, but not during configuration. (@jasone, @ronawho)
Bug 修复:
Fix DSS (sbrk(2)-based) allocation. This regression was first released in 4.3.0. (@jasone)
Handle race in per size class utilization computation. This functionality was first released in 4.0.0. (@interwq)
Fix lock order reversal during gdump. (@jasone)
Fix/refactor tcache synchronization. This regression was first released in 4.0.0. (@jasone)
Fix various JSON-formatted malloc_stats_print() bugs. This functionality was first released in 4.3.0. (@jasone)
Fix huge-aligned allocation. This regression was first released in 4.4.0. (@jasone)
When transparent huge page integration is enabled, detect what state pages start in according to the kernel's current operating mode, and only convert arena chunks to non-huge during purging if that is not their initial state. This functionality was first released in 4.4.0. (@jasone)
Fix lg_chunk clamping for the --enable-cache-oblivious --disable-fill case. This regression was first released in 4.0.0. (@jasone, @428desmo)
Properly detect sparc64 when building for Linux. (@glaubitz)
完整更新内容请查看发布首页。
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